Answer:
the answer is 6a^2- 3ax+ 3a
Answer: 
Step-by-step explanation:
For this exercise is necessary to remember the following formula:

Where "V" is the speed, "d" is the distance and "t" is the time.
In this case you must solve for the time, then:

Based on the information provided in the exercise, you can identify that:

Therefore, knowing this, you can make the substitution into the formula
.
Through this procedure you get that the equation that can be used to find the amount of hours "h" that it will take Sandra to drive "m" miles at her constant speed, is:

The greatest common factor of 9, 21, and 45 is 3.
The difference between your speed is 6 miles per hour: that means that every hour you move 6 miles relative to your friend. But you only need to catch up 3 miles: half of it. So you'll catch up after 30 minutes.
Answer:
true its just a filp with the y and x and resolved
Step-by-step explanation: